404220421423 has 32 divisors (see below), whose sum is σ = 518095613952. Its totient is φ = 306766656000.

The previous prime is 404220421411. The next prime is 404220421427. The reversal of 404220421423 is 324124022404.

It is not a de Polignac number, because 404220421423 - 2²⁵ = 404186866991 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 404220421391 and 404220421400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404220421427) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 315253 + ... + 952798.

It is an arithmetic number, because the mean of its divisors is an integer number (16190487936).

Almost surely, 2^404220421423 is an apocalyptic number.

404220421423 is a deficient number, since it is larger than the sum of its proper divisors (113875192529).

404220421423 is a wasteful number, since it uses less digits than its factorization.

404220421423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1268215.

The product of its (nonzero) digits is 12288, while the sum is 28.

Adding to 404220421423 its reverse (324124022404), we get a palindrome (728344443827).

The spelling of 404220421423 in words is "four hundred four billion, two hundred twenty million, four hundred twenty-one thousand, four hundred twenty-three".